Safety device for printing-presses.



W. H. SYLVESTER.

SAFETY DEVICE FOR PRINTING PRESSES. APPLICATION FILED SEPT. 10. 1915.

1,179,679. Patented Apr. 18,1916.

A 7'TORNE Y UNITED STATES PATENT OFFICE.

WILLIAM H. SYLVESTER, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR T0 WILLIAM H. SYLVESTER AND SONS, OF PHILADELPHIA, PENNSYLVANIA, A FIRM.

SAFETY DEVICE FOR PRINTING-PBESSES.

Specification of Letters Patent.

Patented Apr. 18, 1916.

To all whom it may concern:

Be it known that I, WILLIAM H. SYLvEs- TER, a citizen of the United States, and a resident of the city and county of Philadelphia, State of Pennsylvania, have invented certain new and useful Improvements in Safety Devices for Printing-Presses, of which the following is a specification.

My invention relates to improvements in safety guards for printing presses, and the object of my invention is to furnish an efficient, simple and inexpensive safety guard to prevent the hand or arm of the pressman from being caught between the platen and chase of a reciprocating printing press.

In the accompanying. drawings forming part of this specification and in which similar letters of reference indicate similar parts throughout the several views :Figure 1, is a perspective view of part of a printing press equipped with my improved safety guard, the platen being shown closed against the chase and the guard fully elevated: Fig. 2, a side elevation of part of chase frame and platen in closed position showing the safety guard elevated: Fig. 3, a view similar to that shown in Fig. 2, the platen and chase frame being fully opened and the guard fully retracted.

In the type of press shown in the drawings the platen 4 is carried by a frame 5, through bolts 6, upon a pivot or shaft 7, suitable and Well known means being employed to rock the frame upon this pivot to bringw the platen into operative contact with the chase carried by the chase frame 8, but as the means for actuating the chase frame and platen form no part of my invention, I have not illustrated them.

9 is part of the stationary frame carrying the pivot or shaft 7, 10 a bail shaped rod the ends of which are pivotally attached, at opposite sides of the platen 4, to the stationary frame 9 the connection being, preferably, small supports 11 carried by the frame 9 as shown. 12 are guides carried by platen 4 through which the sides of rod 10 pass.

13 is a curtain the upper end of which is carried by the horizontal part of rod 10 and the lower end of which is secured to the platen.

WVhen the platen is rocked on its pivot 7 so as to contact with the chase the upper 'claim as new and desire end of rod 10 is moved forward with it but the lower ends of this rod being pivotally secured to the fixed supports 11, which are ofi center with the pivot or shaft 7, merely turn upon their fastenings the result being that as the platen approaches the chase the upper end of the rod rises above the upper end of the platen lifting the printers hand and arm, if they are in front of the platen, so that there is no danger of them being caught as the platen and chase make contact. The curtain 13 covers the space between the top of rod 10 and the top of the platen and prevents a hand being introduced between the parts. Upon the opening movement of the platen the rod 10 is moved to the position shown in Fig. 3 where it is completely out of the printers way.

Having thus described my invention I to secure by Letters Patent 1. The combination in a printing press, of a reciprocating platen, a frame carrying said platen, a pivot or shaft upon which said frame can rock, a stationary frame carrying said pivot or shaft, a bail shaped rod, the upper part of which extends from one side to the other of the platen, the sides of which pass down under and parallel with the under side of said platen and the lower ends of which are pivoted to the stationary frame carrying the platen and off center with the pivot or shaft carrying said frame, and guides carried by the under side of said platen through which the sides of said bail pass.

2. In a printing press, in combination, a reciprocating platen, a frame carrying said platen, a pivot or shaft upon which said frame can rock; a stationary frame carrying said pivot or shaft, a bail shaped rod the upper part of which extends from side to side of said platen and the sides of which pass down under said platen, supports, carried ofi" center by the pivot or shaft, carrying frame, to which the lower ends of said bail shaped rod are pivoted, and guides carried by said platen through which the sides of said bail pass.

WILLIAM H. SYLVESTER. Witnesses: CHARLES A. BUTTER, WM. SNYDER. 

